Start timeout timer on fresh login in chat store to enhance session management.

client/src/stores/chat.js

@@ -228,6 +228,8 @@ export const useChatStore = defineStore('chat', () => {
         country.value = data.user.country;
         isoCountryCode.value = data.user.isoCountryCode;
         sessionId.value = data.sessionId;
+        // Wichtig: Beim frischen Login den Timeout-Timer starten
+        startTimeoutTimer();
         break;
       case 'userList':
         users.value = data.users;